Question

write homologous series of alcohol with first three members.

Answer 1

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$\mathfrak{\green{Answer.}}$A homologous series in organic chemistry is a group of organic compounds (compounds that contain C atoms) that differ from each other by one methylene (CH2 ) group. ... For example, methane and ethane are homologues and belong to the same homologous series. They differ from each other by one CH2 group.
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Answer 2

Homologous series is the series of compound in which the compounds have same functional groups & member of the series differ by number of repeat units they contain .

The alcohols in which one -OH group is attached to saturated carbon form homologous series. The formula of the homologous series of alcohol is CnH(2n+1)-OH.

The first member of the series is CH₃OH

The second member of the series is C₂H₅OH

The third member of the series is C₃H₇OH

In this series the repeat unit is -CH₂